Sonic Mania Launches for PC, is Accidentally Online-Only

Steam users are unable to play the game in offline mode, despite Sega's insistence that the game is intended to be playable offline.
Denuvo's copy-protection system seems to be the problem.

Sonic Mania's Denuvo has been cracked in just eight days since launch : r/Games

Sonic Mania - Opening Animation : r/Games

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